<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-row :gutter="20">
        <!-- 输入框 绑定queryInfo中的query属性 调用获取商品列表的函数 -->
        <el-col :span="8" class="list_col">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable>
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <!-- 按钮 -->
        <el-col :span="4">

          <el-button type="primary" @click="goAddPage">添加商品</el-button>
        </el-col>
        </el-row>
        <!-- 表格区域 -->
        <el-table :data="goodsList" border stripe>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="商品名称" prop="goods_name"></el-table-column>
          <el-table-column label="商品价格(元)" prop="goods_price"></el-table-column>
          <el-table-column label="商品重量" prop="goods_weight"></el-table-column>
          <el-table-column label="创建时间" prop="add_time">
            <!-- 用时间过滤器 需要用作用域插槽的形式 -->
            <template slot-scope="scope">{{scope.row.add_time | dateFormat}}</template>
          </el-table-column>
          <el-table-column label="操作">
            <template slot-scope="scope">
              <!-- 编辑按钮 -->
              <el-button type="primary" icon="el-icon-edit" size="small"></el-button>
              <!-- 删除按钮 -->
              <el-button
                type="danger"
                icon="el-icon-delete"
                size="small"
                @click="removeById(scope.row.goods_id)"
              ></el-button>
            </template>
          </el-table-column>
        </el-table>
      
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background
      ></el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        query: '', //查询参数
        pagenum: 1, // 当前页码
        pagesize: 10 //每页显示条数
      },
      goodsList: [],
      total: 0
    }
  },
  created() {
    //打开页面获取商品列表
    this.getGoodsList()
  },
  methods: {
    //获取商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.message.error('获取商品列表失败')
      }
      this.goodsList = res.data.goods
      //   console.log(this.goodsList)
      this.total = res.data.total
    },
    //监听分页显示条数的变化
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      //赋值之后 重新获取列表
      this.getGoodsList()
    },
    //监听当前的页码值变化
    handleCurrentChange(newPagenum) {
      this.queryInfo.pagenum = newPagenum
      this.getGoodsList()
    },
    //通过id删除对应商品
    async removeById(id) {
      //弹窗提示
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
      confirmButtonText: '确定',
      cancelButtonText: '取消',
      type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
      return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`goods/${id}`)
      if (res.meta.status !== 200) {
      return this.message.error('删除失败')
      }
      this.$message.success('删除成功')
      this.getGoodsList()
    },
    //编程式导航
    goAddPage(){
        this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
.list_col{
  margin-bottom: 15px;
  padding-left: 0!important;
}
</style>
